by Din » Mon Mar 16, 2020 9:44 am
PB = Peanut Butter Blaster... best lubricant ever... (LOL).
(Joy here). Ive used those, I have similar, and I can double check one when I get into work today.
The general idea is to loosen the knob to use the manual spin, but you must tighten it to use the fine micro. The issue is that is not quite intuitive, and people break them (did you wonder why it was cheap?) Often they just snap the positioning springs, with the effect that the fine adjust only goes in one direction and the other direction pushes loose. If they are frustrated (or curious like you) they try to take it open and yes, undo one of the set screws that hold the stage together. If you're only using it for a waveplate, dont worry about it - you got a real hefty piece for a deal.
Incidentally, if you're shopping for used opto-mechanno, I recommend
http://www.lightglassoptics.com/
PB = Peanut Butter Blaster... best lubricant ever... (LOL).
(Joy here). Ive used those, I have similar, and I can double check one when I get into work today.
The general idea is to loosen the knob to use the manual spin, but you must tighten it to use the fine micro. The issue is that is not quite intuitive, and people break them (did you wonder why it was cheap?) Often they just snap the positioning springs, with the effect that the fine adjust only goes in one direction and the other direction pushes loose. If they are frustrated (or curious like you) they try to take it open and yes, undo one of the set screws that hold the stage together. If you're only using it for a waveplate, dont worry about it - you got a real hefty piece for a deal.
Incidentally, if you're shopping for used opto-mechanno, I recommend http://www.lightglassoptics.com/